SwiftNIO fails because of old Swift version in base builder

[TobiasWienand]

SwiftNIO now requires Swift tools version ≥5.9. However, base-builder-swift currently installs Swift 5.8.1.

Therefore building the docker image fails: See here: https://oss-fuzz-build-logs.storage.googleapis.com/log-8de4b53e-ca57-4e92-b613-00ec954ef192.txt

[maflcko]

This was fixed by b1208420c2ed03cc58de28a42c783d877da7a840 and can be closed?

See also https://oss-fuzz-build-logs.storage.googleapis.com/index.html#swift-nio